I'm in the camp that cringes when I see a cut-in rest. I also think it's more more work to create and neccesitates added thickness at the arrow pass, which neccesitates a longer dip (longer bow) than without. And if you get into making heavy hunting weight bows, you need to be very careful that you don't create a weak spot in constructing such.
I really like bulbous grips, which reduce to about 3/4" wide at the arrow pass, so the arrow is only 3/8" from center. To maintain a consistent arrow placement, I do like to glue on a leather shelf, built up from 3 layers of latigo. Such a shelf is quick and easy to make with a hobby knife, grit 80 sandpaper, and Barge cement.